The way to solve the problem: first align the last digit of the two multipliers, then use the second multipliers respectively, multiply each digit by one multiplier in turn from the last digit, and finally accumulate the calculation results into products. If the multiplier is decimal, the corresponding multiple can be expanded first, and then the product can be reduced by the corresponding multiple;

Problem solving process:

Step 1: 3×3 1=93

Step 2: 8×3 1=2480

According to the above calculation results, the total is 2573.

Checking calculation: 2573÷83=3 1

Extended data (check result): Divide each bit of dividend from the high bit, keep the quotient obtained by each calculation, and add the next bit to the remainder for operation. After all the digits of the dividend are calculated in this order, the obtained quotients are combined in order, and the remainder is the result of the last operation.

Problem solving process:

Step 1: 257÷83=3, and the remainder is 8.

Step 2: 83÷83= 1 remainder is 0.

According to the above calculation steps, the combined result is 3 1.

If in doubt, please ask questions. If satisfied, please adopt them.